Deusdedit, Saintalso called Deusdedit I, or Adeodatus I ( born , Rome [Italy]—died Nov. 8, 618 , Rome; feast day November 8 ) pope from 615 to 618. His pontificate is chiefly noteworthy for an unsuccessful resumption of the Byzantine war against the Lombards in Italy and for a reversal of the policy of popes Gregory I and Boniface IV, who favoured monks over the secular clergy. Deusdetit, instead, proved partial to the diocesan, or secular, clergy.